This is a full size Pop'n Music controller.

I designed the controller to accommodate an Arduino Leonardo.
Connected to a Type D connector.
But you can also use a generic zero delay controller.

The controller consists of the following parts:

• 1 x Left
• 1 x Up left
• 5 x Center
• 1 x Up right
• 1 x Right
• 2 x Large hatch
• 7 x Hatch

To build it you will need:

• 1,65 Kg of filament
• 1 x Arduino Leonardo
• 1 x Cable Male to Micro USB
• 1 x Type D connector
• 1 x Cable USB Type A/Male to A/Male 
• 9 x 10 cm ( 4 inches ) Arcade buttom ( 2 X white, 2 x Yellow, 2 x green, 2 X ble, 1 x red ) 
• 18 x 6,3mm ( 0.250in ) Crimp connectors to L
• 18 x 4,8mm ( 0.187in ) Crimp connectors
• 57 x M3x10mm Screws
• 48 x M3 Nuts
• 9 x  Heat-set inserts
• Wire various colors